Four institutions have dynamically downscaled CMIP6 global climate model data over Australia:
- Bureau of Meteorology (data collection)
- CSIRO (data collection)
- Queensland Future Climate Science Program (data collection, paper)
- The NARCliM2.0 project (data collection, paper)
(See Appendix below for which CMIP6 global climate models each institution downscaled.)
The Australian Climate Service (ACS) has been pre-processing (to a common 5km grid) and then bias correcting some of these data for projects including the National Climate Risk Assessment (NCRA) and National Hydrological Projections (NHP). Bias correction also involves calibrating against observations, so BARRA-R2 data have also been pre-processed.
This repository tracks the details and progress of the data produced by the ACS bias correction team. A first phase of pre-processing and bias correction was conducted to produce a core general purpose dataset that will soon be published as a stand-alone project on NCI (details will be at https://doi.org/10.25914/yrcz-m051) and now a second phase is underway to service the NHP.
Model outputs and observational data require pre-processing prior to bias correction. This pre-processing involves spatial regridding to the AUST-05i grid, unit conversion and re-chunking.
AUST-05i is the AGCD 0.05 x 0.05 degrees spatial grid: 691 latitudes (112.00 to 156.25 East), 886 longitudes (10.0 to 44.5 South).
For the model outputs, the pre-processing was achieved by running the following at the command line for any given GCM / RCM / model run / variable combination:
bash preprocess-cordex.sh ACCESS-CM2 BARPA-R r4i1p1f1 ssp370 tasmin -n
(The -n is optional and allows for a dry run where the commands
that would be executed are just printed to the screen.)
The following is the equivalent command to submit to the job queue on NCI:
qsub -v gcm=ACCESS-CM2,rcm=BARPA-R,run=r4i1p1f1,exp=ssp370,var=tasmin preprocess-cordex-job.sh
For the observational data, no pre-processing was required for the AGCD data. For BARRA-R2, the pre-processing was achieved by running the following at the command line for any given variable:
bash preprocess-barra.sh tasmin -n
(The -n is optional and allows for a dry run where the commands
that would be executed are just printed to the screen.)
The following is the equivalent command to submit to the job queue on NCI:
qsub -v var=tasmin preprocess-barra-job.sh
The following pre-processed variables are available at a daily timescale for all historical, ssp126 and ssp370 experiment data produced by the BoM, CSIRO, Queensland Future Climate Science Program and NARCliM2.0.
Phase 1:
- Daily maximum surface air temperature (tasmax)
- Daily minimum surface air temperature (tasmin)
- Precipitation (pr)
- Surface downwelling shortwave radiation (rsds)
- Daily maximum surface wind speed (sfcWindmax)
- Daily maximum relative humidity (hursmax)
- Daily minimum relative humidity (hursmin)
Phase 2:
- Surface pressure (ps)
- Sea level pressure (psl)
- Surface specific humidity (huss)
- Surface downwelling longwave radiation (rlds)
- Snowfall (prsn)
- Surface wind speed (sfcWind)
- Surface altitude (orog) (historical experiment only)
The AGCD and pre-processed BARRA-R2 observational data are available on NCI at the following (example) directories:
/g/data/xv83/agcd-csiro/precip/daily/precip-total_AGCD-CSIRO_r005_19300101-19301231_daily.nc
/g/data/ia39/australian-climate-service/release/CORDEX/output-Adjust/CMIP6/bias-adjusted-input/AUST-05i/BOM/ERA5/historical/hres/BARRAR2/v1/day/pr/v20241216/pr_AUST-05i_ERA5_historical_hres_BOM_BARRAR2_v1_day_20020101-20021231.nc
The pre-processed model data is available on NCI at the following (example) directory:
/g/data/ia39/australian-climate-service/release/CORDEX/output-Adjust/CMIP6/bias-adjusted-input/AUST-05i/BOM/CESM2/ssp370/r11i1p1f1/BARPA-R/v1-r1/day/pr/v20241216/pr_AUST-05i_CESM2_ssp370_r11i1p1f1_BOM_BARPA-R_v1-r1_day_20220101-20221231.nc
The phase 1 pre-processed data are also about to be formally published on NCI at the following DOI:
https://doi.org/10.25914/yrcz-m051
The following bias corrected data is currently available for two bias correction methods: Quantile Matching for Extremes (QME) and Multivariate Recursive Nesting Bias Correction (MRNBC). All relevant BoM, CSIRO, Queensland Future Climate Science Program and NARCliM2.0 data were processed.
Phase 1:
| Variable | Timescale | Grid | Units | Observations | Experiments |
|---|---|---|---|---|---|
| Daily maximum surface air temperature (tasmax) | daily | AUST-05i | C | AGCD, BARRA-R2 | historical, ssp126, ssp370 |
| Daily minimum surface air temperature (tasmin) | daily | AUST-05i | C | AGCD, BARRA-R2 | historical, ssp126, ssp370 |
| Precipitation (pr) | daily | AUST-05i | mm/day | AGCD, BARRA-R2 | historical, ssp126, ssp370 |
| Surface downwelling shortwave radiation (rsds) | daily | AUST-05i | W/m2 | BARRA-R2 | historical, ssp126, ssp370 |
| Daily maximum surface wind speed (sfcWindmax) | daily | AUST-05i | m/s | BARRA-R2 | historical, ssp126, ssp370 |
| Daily maximum relative humidity (hursmax) | daily | AUST-05i | % | BARRA-R2 | historical, ssp126, ssp370 |
| Daily minimum relative humidity (hursmin) | daily | AUST-05i | % | BARRA-R2 | historical, ssp126, ssp370 |
Phase 2:
Still to come.
Bias corrected output data are available at:
/g/data/ia39/australian-climate-service/release/CORDEX/output-Adjust/CMIP6/bias-adjusted-output/
For example, pr bias corrected output data for ACCESS-CM2 BARPA-R corrected to AGCD data using the QME method can be found at the following directory:
/g/data/ia39/australian-climate-service/release/CORDEX/output-Adjust/CMIP6/bias-adjusted-output/AUST-05i/BOM/ACCESS-CM2/ssp370/r4i1p1f1/BARPA-R/v1-r1-ACS-QME-AGCDv1-1960-2022/day/prAdjust/v20241216
The phase 1 bias corrected data are also about to be formally published on NCI at the following DOI:
https://doi.org/10.25914/z2jm-nr63
Here's a list of each global climate model (GCM) / regional climate model (RCM) combination processed by each modelling group.
BoM:
- ACCESS-CM2 (run r4i1p1f1) / BARPA-R
- ACCESS-ESM1-5 (r6i1p1f1) / BARPA-R
- CESM2 (r11i1p1f1) / BARPA-R
- CMCC-ESM2 (r1i1p1f1) / BARPA-R
- EC-Earth3 (r1i1p1f1) / BARPA-R
- MPI-ESM1-2-HR (r1i1p1f1) / BARPA-R
- NorESM2-MM (r1i1p1f1) / BARPA-R
CSIRO:
- ACCESS-CM2 (r4i1p1f1) / CCAM-v2203-SN
- ACCESS-ESM1-5 (r6i1p1f1) / CCAM-v2203-SN
- CESM2 (r11i1p1f1) / CCAM-v2203-SN
- CMCC-ESM2 (r1i1p1f1) / CCAM-v2203-SN
- CNRM-ESM2-1 (r1i1p1f2) / CCAM-v2203-SN
- EC-Earth3 (r1i1p1f1) / CCAM-v2203-SN
- NorESM2-MM (r1i1p1f1) / CCAM-v2203-SN
UQ-DEC:
- ACCESS-CM2 (r2i1p1f1) / CCAMoc-v2112
- ACCESS-ESM1-5 (r20i1p1f1) / CCAMoc-v2112
- ACCESS-ESM1-5 (r40i1p1f1) / CCAMoc-v2112
- ACCESS-ESM1-5 (r6i1p1f1) / CCAM-v2105
- CMCC-ESM2 (r1i1p1f1) / CCAM-v2105
- CNRM-CM6-1-HR (r1i1p1f2) / CCAMoc-v2112
- CNRM-CM6-1-HR (r1i1p1f2) / CCAM-v2112
- EC-Earth3 (r1i1p1f1) / CCAM-v2105
- FGOALS-g3 (r4i1p1f1) / CCAM-v2105
- GFDL-ESM4 (r1i1p1f1) / CCAM-v2105
- GISS-E2-1-G (r2i1p1f2) / CCAM-v2105
- MPI-ESM1-2-LR (r9i1p1f1) / CCAM-v2105
- MRI-ESM2-0 (r1i1p1f1) / CCAM-v2105
- NorESM2-MM (r1i1p1f1) / CCAMoc-v2112
- NorESM2-MM (r1i1p1f1) / CCAM-v2112
NSW-Government:
- ACCESS-ESM1-5 (r6i1p1f1) / NARCliM2-0-WRF412R3
- ACCESS-ESM1-5 (r6i1p1f1) / NARCliM2-0-WRF412R5
- EC-Earth3-Veg (r1i1p1f1) / NARCliM2-0-WRF412R3
- EC-Earth3-Veg (r1i1p1f1) / NARCliM2-0-WRF412R5
- MPI-ESM1-2-HR (r1i1p1f1) / NARCliM2-0-WRF412R3
- MPI-ESM1-2-HR (r1i1p1f1) / NARCliM2-0-WRF412R5
- NorESM2-MM (r1i1p1f1) / NARCliM2-0-WRF412R3
- NorESM2-MM (r1i1p1f1) / NARCliM2-0-WRF412R5
- UKESM1-0-LL (r1i1p1f2) / NARCliM2-0-WRF412R3
- UKESM1-0-LL (r1i1p1f2) / NARCliM2-0-WRF412R5